Evidence map›Paper›PMID 31510914›Full record

ArticleBMC genomics2019

Chlamydia pan-genomic analysis reveals balance between host adaptation and selective pressure to genome reduction.

Olga M Sigalova, Andrei V Chaplin, Olga O Bochkareva, Pavel V Shelyakin, Vsevolod A Filaretov, Evgeny E Akkuratov, Valentina Burskaia, Mikhail S Gelfand

Abstract read
In one paragraph

Article in BMC genomics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

30 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Current status and future directions ofFrontiers in veterinary science · 2026
    Pooled it
  2. Pooled it
  3. Review
  4. Article
  5. Article
  6. Article
  7. International journal of systematic and evolutionary microbiology · 2025
    Article
  8. A conservedMicrobiology (Reading, England) · 2025
    Article
  9. Journal of bacteriology · 2025
    Review
  10. Article
  11. Article
  12. Article
  13. Pangenome-Wide Association Study in theInternational journal of molecular sciences · 2024
    Article
  14. Chlamydiosis in Animals.Animals : an open access journal from MDPI · 2024
    Review
  15. Article
  16. Article
  17. Review
  18. New insight on chlamydiae.Journal of veterinary research · 2023
    Article
  19. Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Olga M SigalovaKharkevich Institute for Information Transmission Problems, RAS, Moscow, Russia.
Andrei V ChaplinMicrobiology and Virology Department, Pirogov Russian National Research Medical University, Moscow, Russia.
Olga O BochkarevaKharkevich Institute for Information Transmission Problems, RAS, Moscow, Russia. olga.bochkaryova@gmail.com.ORCID http://orcid.org/0000-0003-1006-6639
Pavel V ShelyakinKharkevich Institute for Information Transmission Problems, RAS, Moscow, Russia.
Vsevolod A FilaretovKharkevich Institute for Information Transmission Problems, RAS, Moscow, Russia.
Evgeny E AkkuratovInstitute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia.
Valentina BurskaiaCenter for Life Sciences, Skolkovo Institute of Science and Technology, Moscow, Russia.
Mikhail S GelfandKharkevich Institute for Information Transmission Problems, RAS, Moscow, Russia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundChlamydia are ancient intracellular pathogens with reduced, though strikingly conserved genome. Despite their parasitic lifestyle and isolated intracellular environment, these bacteria managed to avoid accumulation of deleterious mutations leading to subsequent genome degradation characteristic for many parasitic bacteria.

resultsWe report pan-genomic analysis of sixteen species from genus Chlamydia including identification and functional annotation of orthologous genes, and characterization of gene gains, losses, and rearrangements. We demonstrate the overall genome stability of these bacteria as indicated by a large fraction of common genes with conserved genomic locations. On the other hand, extreme evolvability is confined to several paralogous gene families such as polymorphic membrane proteins and phospholipase D, and likely is caused by the pressure from the host immune system.

conclusionsThis combination of a large, conserved core genome and a small, evolvable periphery likely reflect the balance between the selective pressure towards genome reduction and the need to adapt to escape from the host immunity.

Indexed as

GenomicsSelection, GeneticAdaptation, PhysiologicalChlamydiaEvolution, MolecularGenome, BacterialHost-Pathogen InteractionsMolecular Sequence AnnotationChlamydiaComparative genomicsGenome evolutionIntracellular pathogensPan-genomePmpG

Identifiers

PMID31510914
PMCPMC6740158

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.